Are you looking at an information sheet or the actual census page? Like when you click on a census result on Ancestry, you get this first white page with all the info clearly spelled out and then you have the option to click on the actual form. In that case, the head of house is not listed along with the rest of the names and is at the top of that information sheet Ancestry creates. So if George is the husband, he could also be the father of George the single son. To really know what is going on, I would have to actually see what you are seeing.